Synthetic method of renewable polyester polyol
A technology of polyester polyol and synthesis method, which is applied in the field of synthesis of renewable polyester polyol, can solve problems such as less research, and achieve the effects of wide sources, excellent hydrolysis resistance and solvent resistance, and low price
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Embodiment 1
[0038] The synthetic method of renewable polyester polyol comprises the following steps:
[0039] 1) The following raw materials in parts by weight:
[0040] 40 parts of industrial grade oleic acid with a purity above 90%; 40 parts of maleic anhydride; 160 parts of diethylene glycol; 0.2-0.3 parts of hindered phenolic antioxidant; 0.6-0.7 parts of hydroquinone; 0.1-0.2 parts of tetramethyl titanate; 0.2 parts of an alkaline alcohol solution composed of methanol and KOH, the mass concentration of the alkaline alcohol solution being 10%;
[0041] 2) Preliminary reaction of oleic acid: in N 2 Under the atmosphere, mix all the technical grade oleic acid, all the maleic anhydride, and 0.3 parts of hydroquinone and 0.1 parts of hindered phenolic antioxidant, and then heat to 210 °C at a heating rate of 20 ° C / h ℃ and keep the temperature for reaction. During the reaction, the mixed solution is constantly stirred until the water output reaches 85% of the theoretical water output,...
Embodiment 2
[0045] The synthetic method of renewable polyester polyol comprises the following steps:
[0046] 1) The following raw materials in parts by weight:
[0047] 60 parts of industrial grade oleic acid with a purity of more than 90%; 50 parts of maleic anhydride; 220 parts of diethylene glycol; 0.3 parts of phosphite antioxidant; 0.7 parts of hydroquinone; 0.2 part of ethyl ester; 0.2 part of alkaline alcohol solution composed of ethanol and NaOH, the mass concentration of the alkaline alcohol solution is 10%;
[0048] 2) Preliminary reaction of oleic acid: in N 2Under the atmosphere, mix all the technical grade oleic acid, all the maleic anhydride, and 0.3 part of hydroquinone and 0.1 part of phosphite antioxidant, and then heat at a heating rate of 20°C / h to 230°C and keep the temperature for reaction. During the reaction process, the mixed solution is constantly stirred until the water output reaches 85% of the theoretical water output. The acid value of the maleic anhydride...
Embodiment 3
[0055] The synthetic method of renewable polyester polyol comprises the following steps:
[0056] 1) The following raw materials in parts by weight:
[0057] 50 parts of industrial-grade oleic acid with a purity of more than 90%; 45 parts of maleic anhydride; 200 parts of diethylene glycol; 0.3 parts of composite antioxidants; 0.6 parts of hydroquinone; tetraisopropyl titanate 0.2 part of ester; 0.2 part of sodium methoxide solution, the mass concentration of the sodium methoxide solution is 20%;
[0058] 2) Preliminary reaction of oleic acid: in N 2 Under the atmosphere, mix all the industrial grade oleic acid, all the maleic anhydride, 0.3 part of hydroquinone and 0.1 part of composite antioxidant, and then heat it to 220°C at a heating rate of 20°C / h And keep the temperature for reaction, constantly stir the mixed solution during the reaction, until the water yield reaches 85% of the theoretical water yield, the reaction is complete, then lower the temperature to 110°C to...
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